Damper clutch control method in automatic transmission, involves controlling duty ratio of damper clutch until reception of down-shift start signal, when input of down-shift signal is detected

摘要

The input of down-shift signal when the gear shift mode is in sports mode, is determined and the opening angle of throttle valve is checked to lie within a predetermined range. The duty ratio of damper clutch is controlled until reception of downshift start signal, when the input of down-shift signal is detected.